I accept the IPCC’s findings on AGW. And have read good evidence connecting AGW and recent droughts and increased precipitation. And I accept that there will be consequences such as rising food prices. But as of May 30 ’11 (PBS Newshour), according to climate scientist Katherine Hayhoe (@KHayhoe) and @wunderground ‘s Jeff Masters, it’s still too early to definitively say that this year’s extraordinary tornado season is linked to AGW. (If evidence has arisen since, I’d be interested in knowing of it.) As a science writer, I caution extreme care in attributing weather events to AGW–if only because, if the event is later found to have been caused by another factor, global-warming deniers will use it as evidence that we are wrong in blaming AGW on extreme weather events. For more, here’s my blog post re: extreme weather: http://chrissasaki.wordpress.com/2010/08/11/extreme-weather-calls-for-extreme-care-in-how-we-write-about-climate-change/